Create Validations logging directory

The Validation framework is logging every execution in the
/var/log/validations directory and this one should be created first.

This patch also get rid of the validations user creation because we
don't need anymore since Mistral is out for the validator CLI.

Change-Id: I502c38d3f27db3c6f62a47190136dd03627956bc
Signed-off-by: Gael Chamoulaud <gchamoul@redhat.com>

tripleo_ansible/roles/tripleo-validations-package/tasks/main.yml

@@ -19,11 +19,19 @@
     name: 'openstack-tripleo-validations'
     state: installed
 
-- name: 'Create validations user'
-  user:
-    name: 'validations'
-    comment: 'Tripleo validations'
-    create_home: true
-    home: '/home/validations'
-    shell: '/sbin/nologin'
+- name: Set group name fact
+  set_fact:
+    validations_group_name: "{{ lookup('env', 'SUDO_USER') | default(ansible_user_id, true) }}"
+
+- name: Ensure 'validations_group_name' exists
+  group:
+    name: "{{ validations_group_name }}"
     state: present
+
+- name: 'Create validations logging directory'
+  file:
+    path: '/var/log/validations'
+    state: directory
+    owner: 'root'
+    group: "{{ validations_group_name }}"
+    mode: '2770'